A cline is a gradual, continuous variation that follows a geographical or environmental gradient. It can be seen in characteristics such as skin color or body size, where there is a range of intermediate phenotypes between two extremes. Clines reflect adaptation to local conditions and may reflect natural selection.

Solved

A Cline

Question 7

Multiple Choice

A cline:

A) is continuous variation that follows a continuum.
B) is variation that falls into discrete categories.
C) describes the pattern of occurrence of trisomy 18.
D) was used to describe human variation as early as the Renaissance.

Correct Answer: